A complete one-way oronasal mask system, solid venturi operating with a single source of oxygen, adjustable peep valve from 5 to 15 cm H2O integrated. Pressure gauge for PEEP measurement, integrated anti-suffocation valve. FiO2 adjustable between 40% and 60%. Option to operate the misting system HAR-NEB, accessory separately, without the usage of an additional source of oxygen. MDI portal. Filter for both suction, to protect the patient, and exhalation, to protect the operators.